This looks OK. The DONEWC4 is the Circle Indian Ocean fare. You mention that you are traveling with two kids. There are some pretty long trips in your itinerary (>15 hours) that you might be able to break up by picking flights that are not direct connections but leave within 24 hours, thus not counting as a stopover.

The continent based fares you mention are the around the world (RTW) fares. They allow up to 20 total segments and a maximum of four segments in each continent, except North America where you get six total. The only stopove limit is in the continent of origin (Europe) and that is two. As mentioned previously, these require you to cross both the Atlantic and Pacific once and only once in a forward direction. Thus, you could do a four continent DONE4 ticket: Europe-Africa-SWP-Asia-North America-Europe. The current fare, ex-CAI, for this trip is EGP23320.

For your proposed trip, if you can buy a DONEWC4 ex-CAI for EGP17990 that looks like a much better deal. Again, a report states that the price is going up on Monday.

Good luck.